/* 全局样式 - 简约现代黑色主题 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 主色调 - 简约黑白灰 */
    --primary-color: #ffffff;
    --primary-dark: #f5f5f5;
    --secondary-color: #1a1a1a;
    --accent-color: rgb(22, 22, 22);
    --accent-light: #666666;
    
    /* 文字颜色 */
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --text-muted: #666666;
    --text-dark: #1a1a1a;
    
    /* 背景色 */
    --background: #0a0a0a;
    --surface: #1a1a1a;
    --surface-light: #2a2a2a;
    --surface-hover: #333333;
    
    /* 边框和阴影 */
    --border: #333333;
    --border-light: #444444;
    --shadow: rgba(0, 0, 0, 0.5);
    --shadow-lg: rgba(0, 0, 0, 0.8);
    --glow: rgba(255, 255, 255, 0.1);
    
    /* 其他 */
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--background);
    overflow-x: hidden;
    font-weight: 400;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    transition: var(--transition);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 64px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--text-primary);
}

.nav-logo i {
    font-size: 1.3rem;
    color: var(--text-secondary);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2.5rem;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
    position: relative;
    padding: 8px 0;
}

.nav-menu a:hover {
    color: var(--text-primary);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--text-primary);
    transition: var(--transition);
}

.nav-menu a:hover::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition);
}

/* 主页面 */
.hero {
    padding: 120px 0 100px;
    background: var(--background);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 20%, rgba(255, 255, 255, 0.02) 0%, transparent 50%),
                radial-gradient(circle at 70% 80%, rgba(255, 255, 255, 0.01) 0%, transparent 50%);
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3.2rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.gradient-text {
    color: #3bc4b2;
    position: relative;
}

.gradient-text::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    line-height: 1.7;
    font-weight: 400;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 14px 28px;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 0.95rem;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--text-primary);
    color: var(--background);
    border: 1px solid var(--text-primary);
}

.btn-primary:hover {
    background: var(--text-secondary);
    border-color: var(--text-secondary);
    transform: translateY(-1px);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--surface);
    border-color: var(--text-secondary);
    transform: translateY(-1px);
}

.hero-stats {
    display: flex;
    gap: 3rem;
}

.stat {
    text-align: left;
}

.stat-number {
    display: block;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* 应用程序模拟图 - 简约版 */
.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.app-mockup {
    position: relative;
    transform: perspective(1000px) rotateY(-8deg) rotateX(5deg);
    transition: var(--transition);
}

.app-mockup:hover {
    transform: perspective(1000px) rotateY(-5deg) rotateX(2deg);
}

.mockup-window {
    width: 480px;
    height: 320px;
    background: var(--surface);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 20px 60px var(--shadow-lg);
    overflow: hidden;
    border: 1px solid var(--border);
}

.window-header {
    height: 36px;
    background: var(--surface-light);
    display: flex;
    align-items: center;
    padding: 0 16px;
    border-bottom: 1px solid var(--border);
}

.window-controls {
    display: flex;
    gap: 8px;
}

.control {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    opacity: 0.6;
}

.control.close { background: #666; }
.control.minimize { background: #666; }
.control.maximize { background: #666; }

.window-title {
    flex: 1;
    text-align: center;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-muted);
}

.window-content {
    height: calc(100% - 36px);
    background: var(--surface);
}

.app-interface {
    display: flex;
    height: 100%;
}

.sidebar {
    width: 180px;
    background: var(--surface-light);
    border-right: 1px solid var(--border);
    padding: 16px 0;
}

.sidebar-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.85rem;
}

.sidebar-item:hover,
.sidebar-item.active {
    background: var(--surface-hover);
    color: var(--text-secondary);
}

.sidebar-item i {
    font-size: 0.9rem;
    width: 16px;
}

.main-content {
    flex: 1;
    padding: 16px;
}

.dashboard-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.card {
    background: var(--surface-light);
    padding: 16px;
    border-radius: var(--border-radius);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 12px;
}

.card-icon {
    width: 32px;
    height: 32px;
    background: var(--surface-hover);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.card-info h3 {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 4px;
    font-weight: 500;
}

.card-info p {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-secondary);
}



/* 下载区域 */
.download {
    padding: 100px 0;
    background: var(--background);
}

.download-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.download-info h2 {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.download-info p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    font-weight: 400;
}

.version-info {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.version-badge,
.file-info,
.size-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--surface);
    border-radius: 20px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    border: 1px solid var(--border);
    font-weight: 500;
}

.version-badge {
    background: var(--text-primary);
    color: var(--background);
    border: 1px solid var(--text-primary);
}

.system-requirements {
    background: var(--surface);
    padding: 1.5rem;
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border);
}

.system-requirements h4 {
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-weight: 600;
}

.system-requirements ul {
    list-style: none;
}

.system-requirements li {
    padding: 0.25rem 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: 1.5rem;
    font-size: 0.9rem;
}

.system-requirements li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--text-muted);
    font-weight: bold;
}

.download-action {
    text-align: center;
}

.download-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}

.btn-download {
    padding: 1.5rem 2rem;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    width: 100%;
    max-width: 240px;
    border: 1px solid;
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn-primary-download {
    background: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

.btn-primary-download:hover {
    background: var(--accent-light);
    border-color: var(--accent-light);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 123, 255, 0.15);
}

.btn-secondary-download {
    background: transparent;
    color: var(--text-primary);
    border-color: var(--border);
}

.btn-secondary-download:hover {
    background: var(--surface-light);
    border-color: var(--accent-color);
    color: var(--accent-color);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
}

.btn-download small {
    font-size: 0.8rem;
    opacity: 0.8;
    font-weight: 400;
}

@media (max-width: 768px) {
    .download-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn-download {
        max-width: 280px;
    }
}

.download-note {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.download-note a {
    color: var(--text-secondary);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

.download-note a:hover {
    border-bottom-color: var(--text-secondary);
}

.download-stats {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted);
    font-size: 0.85rem;
}

.stat-item i {
    color: var(--text-secondary);
}

/* 关于我们 */
.about {
    padding: 100px 0;
    background: var(--surface);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text h2 {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.about-text p {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.7;
    font-weight: 400;
}

.contact-info {
    margin-top: 2rem;
}

.contact-info h4 {
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-weight: 600;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.contact-item i {
    color: var(--text-muted);
    width: 16px;
    font-size: 0.9rem;
}

.about-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.about-illustration {
    position: relative;
    width: 280px;
    height: 280px;
}

.illustration-circle {
    width: 160px;
    height: 160px;
    background: var(--surface-light);
    border: 2px solid var(--border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 3rem;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation: float 4s ease-in-out infinite;
}

.floating-elements {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

.element {
    position: absolute;
    width: 48px;
    height: 48px;
    background: var(--surface-light);
    border: 1px solid var(--border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 1.2rem;
    animation: orbit 12s linear infinite;
}

.element-1 {
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    animation-delay: 0s;
}

.element-2 {
    bottom: 20px;
    right: 20px;
    animation-delay: -4s;
}

.element-3 {
    bottom: 20px;
    left: 20px;
    animation-delay: -8s;
}

/* 页脚 */
.footer {
    background: var(--surface);
    color: var(--text-secondary);
    padding: 3rem 0 1.5rem;
    border-top: 1px solid var(--border);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.footer-logo i {
    font-size: 1.3rem;
    color: var(--text-muted);
}

.footer-section h4 {
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.95rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a {
    color: var(--text-muted);
    text-decoration: none;
    transition: var(--transition);
    font-size: 0.9rem;
}

.footer-section ul li a:hover {
    color: var(--text-secondary);
}

.footer-bottom {
    border-top: 1px solid var(--border);
    padding-top: 1.5rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* 动画 */
@keyframes float {
    0%, 100% { transform: translate(-50%, -50%) translateY(0px); }
    50% { transform: translate(-50%, -50%) translateY(-8px); }
}

@keyframes orbit {
    0% { transform: rotate(0deg) translateX(100px) rotate(0deg); }
    100% { transform: rotate(360deg) translateX(100px) rotate(-360deg); }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 3rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .mockup-window {
        width: 100%;
        max-width: 360px;
        height: 240px;
    }
    
    .app-mockup {
        transform: none;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .download-content,
    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .download-stats {
        flex-direction: column;
        align-items: center;
    }
    
    .section-header h2 {
        font-size: 1.8rem;
    }
    
    .features,
    .download,
    .about {
        padding: 80px 0;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .hero {
        padding: 100px 0 80px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .btn {
        padding: 12px 24px;
        font-size: 0.9rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 1.5rem;
        text-align: center;
    }
    
    .nav-container {
        padding: 0 16px;
    }
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--surface);
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--border-light);
}

/* 选择文本样式 */
::selection {
    background: var(--surface-hover);
    color: var(--text-primary);
}